package day20171129;

public class Work4_3 {
    public static void main(String[] args) {
        int[][] a = {{1, 2}, {3, 4, 5}, {6, 7, 8}, {9, 10}, {11, 12, 13, 14, 15}};

        System.out.println(a.length);//数组a的长度

        System.out.println(a[2].length);//第三列的长度

        System.out.println(a[3].length);//第四列的长度
    }
}
